“hydrogen bonds Dispersion forces are the weakest intermolecular force (one hundredth-one thousandth the strength of a covalent bond), hydrogen bonds are the strongest intermolecular force (about one-tenth the strength of a covalent bond).”
The London forces: all molecules have them, they are proportional to the molecule's weight.
The dipole-dipole: this are the result of the interaction between two opposite poles of two polar molecules. This forces are stronger than the London ones.
The hydrogen bonds: This forces are the stongest of the intermolecular forces and happen with the interation between the hydrogen of a moelcule and a very electronegative atom of another molecule. This atoms can be F, O or N.
